#box_bg{
	background-color:#000;
	display:none;
	position:absolute;
	top:0;
	left:0;
	opacity:0.9;
	background:rgba(0, 0, 0, 0.4) none repeat scroll 0 0;
}
#box{
	height:200px;
	width:600px;
	background:#666;
	border:5px ridge #ccc;
	position:relative;
	opacity:1;
}